Periodic Table/Radium/²⁰⁷Ra

← 206Ra208Ra →

²⁰⁷Ra

Radium-207

Radioactive· Half-life: 1.38 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

88

Neutrons (N)

119

Mass Number (A)

207

Atomic Mass

207.003772AMU

Spin / Parity

5/2-

Binding E/A

7.505keV

Natural Abundance

Trace / None

Half-life

1.38 s

Decay Modesoverview · half-life · α · β⁻ · β⁺

α

86.0%

β⁺

Decay Chain

²⁰⁷RaRadium1.38 s

α86.0%

β⁺²⁰⁷Fr

²⁰³RnRadon44.2 s

α66.0%

β⁺²⁰³At34.0%

¹⁹⁹PoPolonium5.47 min

β⁺92.5%

α¹⁹⁵Pb7.50%

¹⁹⁹BiBismuth27.0 min

β⁺100.0%

¹⁹⁹PbLead1.50 h

β⁺100.0%

¹⁹⁹TlThallium7.42 h

β⁺100.0%

¹⁹⁹HgMercurySTABLE

7-step decay chain → stable · Primary path shown · branching ratios indicated

Other Isotopes of Radium

201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235

← Back to RadiumData: IAEA NDS · ENSDF